Patent US5429856A successfully refreshed from Google Patents.
US5429856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite materials and process
Assignee: 3M Co
•
Filing: 1994-04-08
•
Granted: 1995-07-04
•
Expires: 2014-04-08
Abstract
Abstract Inelastic films comprising at least one elastomeric core and a surrounding inelastic matrix preferably prepared by coextrusion. The film when stretched and allowed to recover will create an elastomeric composite.
Inventors
- 👤 Dennis L. Krueger
- 👤 Leigh E. Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:13
CPC Classifications
B; B32; B32B; B32B43/00; A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/514; A61F13/51456; A61F13/51464; A61F13/56; A61F13/58; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/18; B29C48/19; B29C48/20; B29C48/21; B29C48/22; B29C48/25; B29C48/30; B29C48/305; B29C48/307; B29C55/00; B29C55/02; B29C55/023; B29C59/00; B29C59/18; B29C61/00; B29C61/02; B32B25/00; B32B25/04; B32B25/08; B32B27/00; B32B27/12; A61F13/45; A61F13/49; A61F13/49007; A61F13/49009; A61F13/4902; A61F2013/49022; A61F2013/49023; A61F13/51401; A61F2013/51409; A61F2013/51427; B29C59/02; B29C59/022; B29C2059/023; B29C48/05; B32B2307/00; B32B2307/50; B32B2307/51; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24628; Y10T428/24669; Y10T428/249921; Y10T428/249923; Y10T428/28; Y10T428/2848; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2935; Y10T442/00; Y10T442/60; Y10T442/601
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
123 words
A coextruded film comprising at least two discrete laterally spaced and longitudinally parallel elastomeric cores capable of elastic elongation and an inelastic matrix thermoplastic polymeric material completely circumscribing said at least two discrete elastomeric cores so that there is a film region between said at least two elastomeric cores comprising inelastic matrix material, wherein the thickness and the presence of the core material varies across the film and wherein when said coextruded film is stretched past the inelastic deformation limit of the matrix material around said at least two cores the film will be capable of recovery in the cores to form an activated microtextured elastomeric material having microtextured skin layers formed of the matrix material over the at least two elastomeric cores.
Claim 2
Dependent Claim
123 words
A coextruded film comprising at least two discrete laterally spaced and longitudinally parallel elastomeric cores capable of elastic elongation and an inelastic matrix thermoplastic polymeric material completely circumscribing said at least two discrete elastomeric cores so that there is a film region between said at least two elastomeric cores comprising inelastic matrix material, wherein the thickness and the presence of the core material varies across the film and wherein when said coextruded film is stretched past the inelastic deformation limit of the matrix material around said at least two cores the film will be capable of recovery in the cores to form an activated microtextured elastomeric material having microtextured skin layers formed of the matrix material over the at least two elastomeric cores.
Claim 3
Dependent Claim
28 words
The film of claim 1 wherein the laminate in said preferential activation zone will recover from its stretched length by 15% or more after at least 1 second.
Claim 4
Dependent Claim
21 words
The film of claim 1 wherein the laminate will recovery from its stretched length by 15% after at least 5 seconds.
Claim 5
Dependent Claim
21 words
The film of claim 1 wherein the film will recover from its stretched length by 15% after at least 20 seconds.
Claim 6
Dependent Claim
42 words
The film of claim 1 wherein the film will recover from its stretched length by less than 15% after 20 seconds and when then exposed to an activation temperature above 26.7° C. will recover by at least 50% of the total recovery.
Claim 7
Dependent Claim
24 words
The film of claim 1 wherein the at least two elastomeric cores comprises an extrudable polymer and said matrix material is a thermoplastic polymer.
Claim 8
Dependent Claim
23 words
The film of claim 1 wherein the at least two cores are at approximately the same relative location to the two film faces.
Claim 9
Dependent Claim
25 words
The film of claim 1 wherein the at least two elastomeric cores are at different locations in said film relative to the two film faces.
Claim 10
Dependent Claim
34 words
The film of claim 1 comprised of at least two elastomeric cores in a thermoplastic matrix wherein at least two layers are at different locations in said film relative to the two film faces.
Claim 11
Dependent Claim
13 words
The film of claim 8 wherein the at least two elastomeric cores overlap.
Claim 12
Dependent Claim
32 words
The film of claim 1 comprising a diaper closure tab formed of the coextruded film having at least one end region free of elastomeric core containing regions coated with an adhesive layer.
Claim 13
Dependent Claim
17 words
The film of claim 11 further comprising a low adhesion backsize on at least one face thereof.
Claim 14
Dependent Claim
123 words
A coextruded elastomeric film comprising at least two discrete laterally spaced and longitudinally parallel elastomeric cores within a thermoplastic matrix, the thermoplastic matrix forming continuous skin layers over said elastomeric cores on two faces of the film with the thermoplastic matrix completely circumscribing said at least two elastomeric cores so that there is a film region between said at least two elastomeric cores comprising thermoplastic matrix material substantially free of elastomeric core material, wherein the thickness of the cores, and the core materials presence, varies across the film and said thermoplastic matrix has been stretched passed its inelastic deformation limit in at least one direction so as to form microtextured skin layers of the matrix material over the at least two elastomeric cores.
Claim 15
Dependent Claim
123 words
A coextruded elastomeric film comprising at least two discrete laterally spaced and longitudinally parallel elastomeric cores within a thermoplastic matrix, the thermoplastic matrix forming continuous skin layers over said elastomeric cores on two faces of the film with the thermoplastic matrix completely circumscribing said at least two elastomeric cores so that there is a film region between said at least two elastomeric cores comprising thermoplastic matrix material substantially free of elastomeric core material, wherein the thickness of the cores, and the core materials presence, varies across the film and said thermoplastic matrix has been stretched passed its inelastic deformation limit in at least one direction so as to form microtextured skin layers of the matrix material over the at least two elastomeric cores.
Claim 16
Dependent Claim
64 words
The elastomeric film of claim 13 comprising at least two elastomeric cores having deformed matrix material there between such that the deformed matrix material is formed into a uniform and periodic macroscopic folded structure between adjacent core-containing regions, the macroscopic folding comprising folding of the entire film in the region between adjacent core-containing regions without said macroscopic folded structure in said adjacent core-containing regions.
Claim 17
Dependent Claim
31 words
The elastomeric film of claim 13 comprising a diaper closure tab formed of the coextruded film having at least one end region free of elastomeric core coated with an adhesive layer.
Claim 18
Dependent Claim
18 words
The elastomeric film of claim 15 further comprising a low adhesion backsize on at least one face thereof.
Claim 19
Dependent Claim
18 words
The elastomeric film of claim 13 further comprising a garment wherein said elastomeric film provides discrete elastic regions.
Claim 20
Dependent Claim
29 words
The elastomeric film of claim 13 comprising a diaper backsheet wherein said elastomeric core comprises a discrete elasticized zone and said matrix material forms a liquid-impermeable diaper backsheet portion.
Claim 21
Dependent Claim
19 words
The elastomeric film of claim 18 wherein said discrete elasticized zone is a waistband engaging portion of said backsheet.
Claim 22
Dependent Claim
19 words
The elastomeric film of claim 18 wherein said discrete elasticized zone is a leg engaging portion of said backsheet.
Claim 23
Dependent Claim
23 words
The elastomeric film of claim 13 further comprising a layer of pressure-sensitive adhesive on at least one outer face of said elastomeric film.
Claim 24
Dependent Claim
23 words
The elastomeric film of claim 12 further comprising a layer of pressure-sensitive adhesive on at least one outer face of said elastomeric film.
References Cited (Backward Citations)
USRE22038E
Cited
US2509674A
Cited
US3265765A
Cited
US3365315A
Cited
US3485912A
Cited
US3479425A
Cited
US3562356A
Cited
US3560292A
Cited
US3557265A
Cited
US3616770A
Cited
US3639917A
Cited
US3700633A
Cited
US3800796A
Cited
US4177812A
Cited
US3860003B2
Cited
US3860003A
Cited
US3860003B1
Cited
US4156673A
Cited
US4152387A
Cited
US4116927A
Cited
US4324245A
Cited
US4352355A
Cited
US4573991A
Cited
US4239578A
Cited
US4309236A
Cited
US4261782A
Cited
US4300562A
Cited
US4643729A
Cited
US4381781A
Cited
US4386125A
Cited
US4371417A
Cited
US4389212A
Cited
US4626305A
Cited
US4687477A
Cited
US4476180A
Cited
US4710189A
Cited
US4552795A
Cited
US4642819A
Cited
US4681580A
Cited
US4813946A
Cited
US4813947A
Cited
US4795456A
Cited
GB2190406A
Cited
US4778701A
Cited
US4756942A
Cited
US4834820A
Cited
US4767726A
Cited
US4880682A
Cited
WO1990002540A1
Cited
US5344691A
Cited
US5354597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-07-03 | 1999-01-02 | 1999-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-03 | 2003-01-02 | 2003-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-03 | 2007-01-02 | 2007-07-04 | $7700.00 | Window Closed / Lapsed |